NASA astronauts Andrew Morgan and Luca Parmitano of the European Space Agency (ESA) will venture outside the International Space Station from 7:05 am EST to begin repairing the alpha magnetic spectrometer (AMS). ). This is the first in a series of repair spacewalks – the most complex of its kind since the maintenance of the Hubble Space Telescope. AMS is linked to the outside of the space station, where it has been in operation since 2011. It is a particle physics experiment that works to help us understand dark matter and the origins of the universe.